Andrew Z. answered 03/16/19
Experienced MFA Grad Teaching English, Literature and Writing
Hi Imelda,
I will clarify this for you, but first let me state that the manner in which words are used change (sometimes drastically) over time. In this case, Pope is speaking about a cleric who really likes to drink beer. This cleric is part of a "horde" of people who have been trying to get Pope to read their poetry as they desire his approval. Basically he's complaining about a parson who drinks a lot of beer and seems to think it inspires him, possibly hinting that the man is an alcoholic. The parson was trying to find his own writing inspiration through beer, and was sending his verses to Pope in hope of getting Pope's approval. Pope used the word "bemused in beer" to state that this parson drank a lot, but today we would probably use different terminology for this.
-Andrew